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Non-operating Income (Expense) (Notes) | 6 Months Ended
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Jun. 30, 2024
Nonoperating Income (Expense) [Abstract] |
Other Nonoperating Income and Expense [Text Block] | Non-Operating Expense The components of “Non-operating expense” in the Consolidated Statements of Operations for the quarter and six months ended June 30, 2024 and 2023 are reflected in the table below:
| Quarter Ended June 30, |  | Six Months Ended June 30,
| 2024 | 2023 |  | 2024 | 2023
Interest expense | $ | (16.1) |  | $ | (7.6) |  |  | $ | (22.8) |  | $ | (15.2) |
Amortization of debt issuance costs and accretion of debt discount | (0.7) |  | (0.3) |  |  | (1.1) |  | (0.6) |
Interest income | 0.8 |  | 0.3 |  |  | 1.4 |  | 0.6 |
Interest expense, net | (16.0) |  | (7.5) |  |  | (22.6) |  | (15.1) |
Non-operating pension and other postretirement employee benefits | 0.3 |  | 0.1 |  |  | 0.7 |  | 0.2 |
Total non-operating expense | $ | (15.7) |  | $ | (7.4) |  |  | $ | (21.9) |  | $ | (14.9) |

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- Definition The entire disclosure for the components of non-operating income or non-operating expense, including, but not limited to, amounts earned from dividends, interest on securities, gain (loss) on securities sold, equity earnings of unconsolidated affiliates, gain (loss) on sales of business, interest expense and other miscellaneous income or expense items. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(7)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(9)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 + Details
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